Answer:
Suppose the next case.
You want to buy an object from another state or country, you know that the cost of this object is C, and for bringing it from another place, you need to pay a tax, such that you do not know the exact value of the tax, you know that this can be between 3% and 9%.
Then the tax can be written as:
6% ± 3%
then the error is 3%, this means that the percent error is:
(3%/6%)*100% = 50%
Then you know that there is an error of 50% in the tax.
This can be helpful so you can estimate the maximum and minimum cost of tax that you will pay for this purchase.
Also there are a lot of situations where the percent error give us a lot of information.
"a measure of 10 cm with an error of 1 cm"
The percent error is: (1cm/10cm)*100% = 10%
And in a measure of 3cm with an error of 1cm we have:
(1cm/3cm) = 33.33%
In both cases we have the came error, but different percent error.
Then the percent error also tell us how much the error affects our measure.
A) We want to know when h=10 so
10=-16t^2+40t+3
16t^2-40t+7=0
Using the quadratic formula:
t=(40±√1152)/32
t≈0.189 and 2.311 seconds
So it is at 10 ft twice, about 2/10 of a second when it is rising and at 2 3/10 of a second when it is falling...
b.
The maximum height of the ball is when velocity is equal to zero, or dh/dt=0
dh/dt=-32t+40, dh/dt=0 when 32t=40, t=40/32=5/4=1.25 seconds
h(1.25)=28ft
So the maximum height of the ball occurs after 1.25 seconds and reaches a height of 28 feet.
Answer:
D
Step-by-step explanation:
The given function builds on the parent graphy = x^2.
Consider two right triangles ΔKML and ΔOPQ. From the diagram you can see that:
- KL≅OQ (hypotenuses);
- ∠MLK≅∠OQP (adjacent angles to the hypotenuses).
Then you can use HA theorem that states: "If the hypotenuse and an acute angle of one right triangle are congruent to the hypotenuse and an acute angle of another right triangle, then the two triangles are congruent."
Answer: correct choice is B.
You would subtract 1/5y, and multiply both sides by 2 (1/2's reciprocal)
